From: Jens Axboe <jens.axboe@oracle.com>
To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Cc: Jens Axboe <jens.axboe@oracle.com>, greg@kroah.com
Subject: [PATCH 30/33] USB storage: sg chaining support
Date: Mon, 16 Jul 2007 11:47:44 +0200 [thread overview]
Message-ID: <11845792692184-git-send-email-jens.axboe@oracle.com> (raw)
In-Reply-To: <11845792671245-git-send-email-jens.axboe@oracle.com>
[PATCH] USB storage: sg chaining support
Modify usb_stor_access_xfer_buf() to take a pointer to an sg
entry pointer, so we can keep track of that instead of passing
around an integer index (which we can't use when dealing with
multiple scatterlist arrays).
Cc: greg@kroah.com
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
drivers/usb/storage/alauda.c | 16 ++++++++++------
drivers/usb/storage/datafab.c | 10 ++++++----
drivers/usb/storage/jumpshot.c | 10 ++++++----
drivers/usb/storage/protocol.c | 20 +++++++++++---------
drivers/usb/storage/protocol.h | 2 +-
drivers/usb/storage/sddr09.c | 16 ++++++++++------
drivers/usb/storage/sddr55.c | 16 ++++++++++------
drivers/usb/storage/shuttle_usbat.c | 17 ++++++++---------
8 files changed, 62 insertions(+), 45 deletions(-)
diff --git a/drivers/usb/storage/alauda.c b/drivers/usb/storage/alauda.c
index 4d3cbb1..8d3711a 100644
--- a/drivers/usb/storage/alauda.c
+++ b/drivers/usb/storage/alauda.c
@@ -798,12 +798,13 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
{
unsigned char *buffer;
u16 lba, max_lba;
- unsigned int page, len, index, offset;
+ unsigned int page, len, offset;
unsigned int blockshift = MEDIA_INFO(us).blockshift;
unsigned int pageshift = MEDIA_INFO(us).pageshift;
unsigned int blocksize = MEDIA_INFO(us).blocksize;
unsigned int pagesize = MEDIA_INFO(us).pagesize;
unsigned int uzonesize = MEDIA_INFO(us).uzonesize;
+ struct scatterlist *sg;
int result;
/*
@@ -827,7 +828,8 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
max_lba = MEDIA_INFO(us).capacity >> (blockshift + pageshift);
result = USB_STOR_TRANSPORT_GOOD;
- index = offset = 0;
+ offset = 0;
+ sg = NULL;
while (sectors > 0) {
unsigned int zone = lba / uzonesize; /* integer division */
@@ -873,7 +875,7 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
/* Store the data in the transfer buffer */
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &index, &offset, TO_XFER_BUF);
+ &sg, &offset, TO_XFER_BUF);
page = 0;
lba++;
@@ -891,11 +893,12 @@ static int alauda_write_data(struct us_data *us, unsigned long address,
unsigned int sectors)
{
unsigned char *buffer, *blockbuffer;
- unsigned int page, len, index, offset;
+ unsigned int page, len, offset;
unsigned int blockshift = MEDIA_INFO(us).blockshift;
unsigned int pageshift = MEDIA_INFO(us).pageshift;
unsigned int blocksize = MEDIA_INFO(us).blocksize;
unsigned int pagesize = MEDIA_INFO(us).pagesize;
+ struct scatterlist *sg;
u16 lba, max_lba;
int result;
@@ -929,7 +932,8 @@ static int alauda_write_data(struct us_data *us, unsigned long address,
max_lba = MEDIA_INFO(us).capacity >> (pageshift + blockshift);
result = USB_STOR_TRANSPORT_GOOD;
- index = offset = 0;
+ offset = 0;
+ sg = NULL;
while (sectors > 0) {
/* Write as many sectors as possible in this block */
@@ -946,7 +950,7 @@ static int alauda_write_data(struct us_data *us, unsigned long address,
/* Get the data from the transfer buffer */
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &index, &offset, FROM_XFER_BUF);
+ &sg, &offset, FROM_XFER_BUF);
result = alauda_write_lba(us, lba, page, pages, buffer,
blockbuffer);
diff --git a/drivers/usb/storage/datafab.c b/drivers/usb/storage/datafab.c
index c87ad1b..579e9f5 100644
--- a/drivers/usb/storage/datafab.c
+++ b/drivers/usb/storage/datafab.c
@@ -98,7 +98,8 @@ static int datafab_read_data(struct us_data *us,
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
- unsigned int sg_idx = 0, sg_offset = 0;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
// we're working in LBA mode. according to the ATA spec,
// we can support up to 28-bit addressing. I don't know if Datafab
@@ -155,7 +156,7 @@ static int datafab_read_data(struct us_data *us,
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &sg_idx, &sg_offset, TO_XFER_BUF);
+ &sg, &sg_offset, TO_XFER_BUF);
sector += thistime;
totallen -= len;
@@ -181,7 +182,8 @@ static int datafab_write_data(struct us_data *us,
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
- unsigned int sg_idx = 0, sg_offset = 0;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
// we're working in LBA mode. according to the ATA spec,
// we can support up to 28-bit addressing. I don't know if Datafab
@@ -217,7 +219,7 @@ static int datafab_write_data(struct us_data *us,
// Get the data from the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &sg_idx, &sg_offset, FROM_XFER_BUF);
+ &sg, &sg_offset, FROM_XFER_BUF);
command[0] = 0;
command[1] = thistime;
diff --git a/drivers/usb/storage/jumpshot.c b/drivers/usb/storage/jumpshot.c
index 003fcf5..61097cb 100644
--- a/drivers/usb/storage/jumpshot.c
+++ b/drivers/usb/storage/jumpshot.c
@@ -119,7 +119,8 @@ static int jumpshot_read_data(struct us_data *us,
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
- unsigned int sg_idx = 0, sg_offset = 0;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
// we're working in LBA mode. according to the ATA spec,
// we can support up to 28-bit addressing. I don't know if Jumpshot
@@ -170,7 +171,7 @@ static int jumpshot_read_data(struct us_data *us,
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &sg_idx, &sg_offset, TO_XFER_BUF);
+ &sg, &sg_offset, TO_XFER_BUF);
sector += thistime;
totallen -= len;
@@ -195,7 +196,8 @@ static int jumpshot_write_data(struct us_data *us,
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result, waitcount;
- unsigned int sg_idx = 0, sg_offset = 0;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
// we're working in LBA mode. according to the ATA spec,
// we can support up to 28-bit addressing. I don't know if Jumpshot
@@ -225,7 +227,7 @@ static int jumpshot_write_data(struct us_data *us,
// Get the data from the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &sg_idx, &sg_offset, FROM_XFER_BUF);
+ &sg, &sg_offset, FROM_XFER_BUF);
command[0] = 0;
command[1] = thistime;
diff --git a/drivers/usb/storage/protocol.c b/drivers/usb/storage/protocol.c
index 9ad3042..cc8f7c5 100644
--- a/drivers/usb/storage/protocol.c
+++ b/drivers/usb/storage/protocol.c
@@ -157,7 +157,7 @@ void usb_stor_transparent_scsi_command(struct scsi_cmnd *srb,
* pick up from where this one left off. */
unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
- unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index,
+ unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **sgptr,
unsigned int *offset, enum xfer_buf_dir dir)
{
unsigned int cnt;
@@ -184,16 +184,17 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
* located in high memory -- then kmap() will map it to a temporary
* position in the kernel's virtual address space. */
} else {
- struct scatterlist *sg =
- (struct scatterlist *) srb->request_buffer
- + *index;
+ struct scatterlist *sg = *sgptr;
+
+ if (!sg)
+ sg = (struct scatterlist *) srb->request_buffer;
/* This loop handles a single s-g list entry, which may
* include multiple pages. Find the initial page structure
* and the starting offset within the page, and update
* the *offset and *index values for the next loop. */
cnt = 0;
- while (cnt < buflen && *index < srb->use_sg) {
+ while (cnt < buflen) {
struct page *page = sg->page +
((sg->offset + *offset) >> PAGE_SHIFT);
unsigned int poff =
@@ -209,8 +210,7 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
/* Transfer continues to next s-g entry */
*offset = 0;
- ++*index;
- ++sg;
+ sg = sg_next(sg);
}
/* Transfer the data for all the pages in this
@@ -234,6 +234,7 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
sglen -= plen;
}
}
+ *sgptr = sg;
}
/* Return the amount actually transferred */
@@ -245,9 +246,10 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
void usb_stor_set_xfer_buf(unsigned char *buffer,
unsigned int buflen, struct scsi_cmnd *srb)
{
- unsigned int index = 0, offset = 0;
+ unsigned int offset = 0;
+ struct scatterlist *sg = NULL;
- usb_stor_access_xfer_buf(buffer, buflen, srb, &index, &offset,
+ usb_stor_access_xfer_buf(buffer, buflen, srb, &sg, &offset,
TO_XFER_BUF);
if (buflen < srb->request_bufflen)
srb->resid = srb->request_bufflen - buflen;
diff --git a/drivers/usb/storage/protocol.h b/drivers/usb/storage/protocol.h
index 845bed4..8737a36 100644
--- a/drivers/usb/storage/protocol.h
+++ b/drivers/usb/storage/protocol.h
@@ -52,7 +52,7 @@ extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*,
enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF};
extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
- unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index,
+ unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **,
unsigned int *offset, enum xfer_buf_dir dir);
extern void usb_stor_set_xfer_buf(unsigned char *buffer,
diff --git a/drivers/usb/storage/sddr09.c b/drivers/usb/storage/sddr09.c
index b2ed2a3..b12202c 100644
--- a/drivers/usb/storage/sddr09.c
+++ b/drivers/usb/storage/sddr09.c
@@ -705,7 +705,8 @@ sddr09_read_data(struct us_data *us,
unsigned char *buffer;
unsigned int lba, maxlba, pba;
unsigned int page, pages;
- unsigned int len, index, offset;
+ unsigned int len, offset;
+ struct scatterlist *sg;
int result;
// Figure out the initial LBA and page
@@ -730,7 +731,8 @@ sddr09_read_data(struct us_data *us,
// contiguous LBA's. Another exercise left to the student.
result = 0;
- index = offset = 0;
+ offset = 0;
+ sg = NULL;
while (sectors > 0) {
@@ -777,7 +779,7 @@ sddr09_read_data(struct us_data *us,
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &index, &offset, TO_XFER_BUF);
+ &sg, &offset, TO_XFER_BUF);
page = 0;
lba++;
@@ -931,7 +933,8 @@ sddr09_write_data(struct us_data *us,
unsigned int pagelen, blocklen;
unsigned char *blockbuffer;
unsigned char *buffer;
- unsigned int len, index, offset;
+ unsigned int len, offset;
+ struct scatterlist *sg;
int result;
// Figure out the initial LBA and page
@@ -968,7 +971,8 @@ sddr09_write_data(struct us_data *us,
}
result = 0;
- index = offset = 0;
+ offset = 0;
+ sg = NULL;
while (sectors > 0) {
@@ -987,7 +991,7 @@ sddr09_write_data(struct us_data *us,
// Get the data from the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &index, &offset, FROM_XFER_BUF);
+ &sg, &offset, FROM_XFER_BUF);
result = sddr09_write_lba(us, lba, page, pages,
buffer, blockbuffer);
diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
index 0b1b5b5..d43a341 100644
--- a/drivers/usb/storage/sddr55.c
+++ b/drivers/usb/storage/sddr55.c
@@ -167,7 +167,8 @@ static int sddr55_read_data(struct us_data *us,
unsigned long address;
unsigned short pages;
- unsigned int len, index, offset;
+ unsigned int len, offset;
+ struct scatterlist *sg;
// Since we only read in one block at a time, we have to create
// a bounce buffer and move the data a piece at a time between the
@@ -178,7 +179,8 @@ static int sddr55_read_data(struct us_data *us,
buffer = kmalloc(len, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR; /* out of memory */
- index = offset = 0;
+ offset = 0;
+ sg = NULL;
while (sectors>0) {
@@ -255,7 +257,7 @@ static int sddr55_read_data(struct us_data *us,
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &index, &offset, TO_XFER_BUF);
+ &sg, &offset, TO_XFER_BUF);
page = 0;
lba++;
@@ -287,7 +289,8 @@ static int sddr55_write_data(struct us_data *us,
unsigned short pages;
int i;
- unsigned int len, index, offset;
+ unsigned int len, offset;
+ struct scatterlist *sg;
/* check if we are allowed to write */
if (info->read_only || info->force_read_only) {
@@ -304,7 +307,8 @@ static int sddr55_write_data(struct us_data *us,
buffer = kmalloc(len, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
- index = offset = 0;
+ offset = 0;
+ sg = NULL;
while (sectors > 0) {
@@ -322,7 +326,7 @@ static int sddr55_write_data(struct us_data *us,
// Get the data from the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &index, &offset, FROM_XFER_BUF);
+ &sg, &offset, FROM_XFER_BUF);
US_DEBUGP("Write %02X pages, to PBA %04X"
" (LBA %04X) page %02X\n",
diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c
index 5e27297..a0ff394 100644
--- a/drivers/usb/storage/shuttle_usbat.c
+++ b/drivers/usb/storage/shuttle_usbat.c
@@ -996,7 +996,8 @@ static int usbat_flash_read_data(struct us_data *us,
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
- unsigned int sg_idx = 0, sg_offset = 0;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
result = usbat_flash_check_media(us, info);
if (result != USB_STOR_TRANSPORT_GOOD)
@@ -1050,7 +1051,7 @@ static int usbat_flash_read_data(struct us_data *us,
/* Store the data in the transfer buffer */
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &sg_idx, &sg_offset, TO_XFER_BUF);
+ &sg, &sg_offset, TO_XFER_BUF);
sector += thistime;
totallen -= len;
@@ -1086,7 +1087,8 @@ static int usbat_flash_write_data(struct us_data *us,
unsigned char thistime;
unsigned int totallen, alloclen;
int len, result;
- unsigned int sg_idx = 0, sg_offset = 0;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
result = usbat_flash_check_media(us, info);
if (result != USB_STOR_TRANSPORT_GOOD)
@@ -1125,7 +1127,7 @@ static int usbat_flash_write_data(struct us_data *us,
/* Get the data from the transfer buffer */
usb_stor_access_xfer_buf(buffer, len, us->srb,
- &sg_idx, &sg_offset, FROM_XFER_BUF);
+ &sg, &sg_offset, FROM_XFER_BUF);
/* ATA command 0x30 (WRITE SECTORS) */
usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
@@ -1165,8 +1167,8 @@ static int usbat_hp8200e_handle_read10(struct us_data *us,
unsigned char *buffer;
unsigned int len;
unsigned int sector;
- unsigned int sg_segment = 0;
unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
US_DEBUGP("handle_read10: transfersize %d\n",
srb->transfersize);
@@ -1223,9 +1225,6 @@ static int usbat_hp8200e_handle_read10(struct us_data *us,
sector |= short_pack(data[7+5], data[7+4]);
transferred = 0;
- sg_segment = 0; /* for keeping track of where we are in */
- sg_offset = 0; /* the scatter/gather list */
-
while (transferred != srb->request_bufflen) {
if (len > srb->request_bufflen - transferred)
@@ -1258,7 +1257,7 @@ static int usbat_hp8200e_handle_read10(struct us_data *us,
/* Store the data in the transfer buffer */
usb_stor_access_xfer_buf(buffer, len, srb,
- &sg_segment, &sg_offset, TO_XFER_BUF);
+ &sg, &sg_offset, TO_XFER_BUF);
/* Update the amount transferred and the sector number */
--
1.5.3.rc0.90.gbaa79
next prev parent reply other threads:[~2007-07-16 9:53 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 9:47 [PATCH 00/33] SG table " Jens Axboe
2007-07-16 9:47 ` [PATCH 01/33] crypto: don't pollute the global namespace with sg_next() Jens Axboe
2007-07-16 9:47 ` [PATCH 02/33] Add sg helpers for iterating over a scatterlist table Jens Axboe
2007-07-16 9:47 ` [PATCH 03/33] block: convert to using sg helpers Jens Axboe
2007-07-16 19:21 ` Bartlomiej Zolnierkiewicz
2007-07-16 19:14 ` Jens Axboe
2007-07-16 9:47 ` [PATCH 04/33] scsi: " Jens Axboe
2007-07-16 9:47 ` [PATCH 05/33] Add chained sg support to linux/scatterlist.h Jens Axboe
2007-07-16 19:21 ` Bartlomiej Zolnierkiewicz
2007-07-16 19:15 ` Jens Axboe
2007-07-16 9:47 ` [PATCH 06/33] i386 dma_map_sg: convert to using sg helpers Jens Axboe
2007-07-16 9:47 ` [PATCH 07/33] i386: enable sg chaining Jens Axboe
2007-07-16 9:47 ` [PATCH 08/33] swiotlb: sg chaining support Jens Axboe
2007-07-16 9:47 ` [PATCH 09/33] x86-64: update iommu/dma mapping functions to sg helpers Jens Axboe
2007-07-16 20:06 ` Andrew Morton
2007-07-16 20:10 ` Jens Axboe
2007-07-16 20:34 ` Andrew Morton
2007-07-16 22:08 ` Muli Ben-Yehuda
2007-07-17 7:38 ` Jens Axboe
2007-07-17 8:49 ` Muli Ben-Yehuda
2007-07-17 8:51 ` Jens Axboe
2007-07-17 9:00 ` Muli Ben-Yehuda
2007-07-17 7:02 ` Jens Axboe
2007-07-17 7:56 ` Jens Axboe
2007-07-17 11:03 ` Muli Ben-Yehuda
2007-07-17 11:05 ` Jens Axboe
2007-07-17 11:10 ` Muli Ben-Yehuda
2007-07-16 9:47 ` [PATCH 10/33] x86-64: enable sg chaining Jens Axboe
2007-07-16 9:47 ` [PATCH 11/33] IA64: sg chaining support Jens Axboe
2007-07-16 9:47 ` [PATCH 12/33] PPC: " Jens Axboe
2007-07-16 9:47 ` [PATCH 13/33] SPARC: " Jens Axboe
2007-07-16 11:29 ` David Miller
2007-07-16 9:47 ` [PATCH 14/33] SPARC64: " Jens Axboe
2007-07-16 11:29 ` David Miller
2007-07-16 9:47 ` [PATCH 15/33] scsi: simplify scsi_free_sgtable() Jens Axboe
2007-07-16 9:47 ` [PATCH 16/33] SCSI: support for allocating large scatterlists Jens Axboe
2007-07-16 9:47 ` [PATCH 17/33] ll_rw_blk: temporarily enable max_segments tweaking Jens Axboe
2007-07-16 9:47 ` [PATCH 18/33] libata: convert to using sg helpers Jens Axboe
2007-07-16 9:47 ` [PATCH 19/33] scsi_debug: support sg chaining Jens Axboe
2007-07-16 9:47 ` [PATCH 20/33] scsi generic: sg chaining support Jens Axboe
2007-07-16 9:47 ` [PATCH 21/33] qla1280: " Jens Axboe
2007-07-16 9:47 ` [PATCH 22/33] aic94xx: " Jens Axboe
2007-07-16 9:47 ` [PATCH 23/33] qlogicpti: " Jens Axboe
2007-07-16 9:47 ` [PATCH 24/33] ide-scsi: " Jens Axboe
2007-07-18 21:03 ` Bartlomiej Zolnierkiewicz
2007-07-16 9:47 ` [PATCH 25/33] gdth: " Jens Axboe
2007-07-16 9:47 ` [PATCH 26/33] aha1542: convert to use the data buffer accessors Jens Axboe
2007-07-16 9:47 ` [PATCH 27/33] advansys: " Jens Axboe
2007-07-16 9:47 ` [PATCH 28/33] ia64 simscsi: convert to use " Jens Axboe
2007-07-16 9:47 ` [PATCH 29/33] infiniband: sg chaining support Jens Axboe
2007-07-16 13:21 ` FUJITA Tomonori
2007-07-16 13:26 ` Jens Axboe
2007-07-16 9:47 ` Jens Axboe [this message]
2007-07-17 6:12 ` [PATCH 30/33] USB storage: " Greg KH
2007-07-17 7:01 ` Jens Axboe
2007-07-17 7:05 ` Greg KH
2007-07-17 7:07 ` Jens Axboe
2007-07-16 9:47 ` [PATCH 31/33] Fusion: " Jens Axboe
2007-07-16 13:20 ` FUJITA Tomonori
2007-07-16 13:25 ` Jens Axboe
2007-07-16 9:47 ` [PATCH 32/33] i2o: " Jens Axboe
2007-07-16 9:47 ` [PATCH 33/33] IDE: " Jens Axboe
2007-07-18 20:56 ` Bartlomiej Zolnierkiewicz
2007-07-19 6:19 ` Jens Axboe
2007-07-16 13:19 ` [PATCH 00/33] SG table " FUJITA Tomonori
2007-07-16 13:23 ` Jens Axboe
2007-07-16 13:19 ` FUJITA Tomonori
2007-07-16 13:24 ` Jens Axboe
2007-07-16 14:05 ` John Stoffel
2007-07-16 14:23 ` Martin K. Petersen
2007-07-16 14:43 ` Jens Axboe
2007-07-16 16:02 ` Kai Makisara
2007-07-16 16:43 ` Jens Axboe
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